Acetylene-search-lamp.



No. 731,596. PATBNTED JUNE 23, 1903. A. J. MURDOCK & G. M. STROUD.

AGETYLENE SEARCH LAMP. APPLICATION FILED AUG. 19, 1901.

H0 MODEL. s sums-sum 1.

' %Z21/aava I N0 MODEL.

PATENTBD JUNE 23, 1903.

'. A. J. MURDOGK & c. M. STROUD.

AGETYLENE SEARCH LAMP.

APPLICATION FILED AUG.19, 1901.

3 SHEETS-SHEET 2- ma WA;

. PATBNTED JUNEZS, 1903. A. J. MIURDOGKV & c. M. STROUD.

ACETYLENE SEARCH LAMP. APPLIOATION'IILED AUG. 19, 1901.

3 SHEETS-SHEET 3.

N0 MODEL,

TH: NORRIS Barns co. Puma-Luna. WAsMNcYom-Dsql a? PATENT UNIT STATES Patented June 23, 1903.

OFFICE.

ALBERT J. MURDOOK, OF MINNEAPOLIS, AND CHARLES M. STROUD, OF

' HASTINGS, ,MINNESOTA.

ACETYLENUE. SEARCH-LAMP.

SPEGIFIQATIONforming part of Letters Patent No. 731,596, dated June 23, 1903. i Application iiledAugust 19, 19(l1, .Serial No. 72,596. (No model.)

Be itkhown thatwe; ALBERT J. MURDOOK, residing atMinneapolis, in the county of Hen nepin, and CHARLES STROUD, residing at Hastings, in the countyofaDa'kota, State of Minnesota, citizens of the United States, have inventedcertain new and useful Improvements: in; Acetylene Search-Lamps; and we do hereby declare the following to be a full, clear, and exact description of the'invention,

such as will enable others skilled in the art 1 to which it appertains to make and use the same.

after described, and defined in the claims.

The invention is illustrated in the accompanying *drawings,' whereiu* like'tcharacters indicate like parts throughout the several views. I

Figure 1 is a view in side, elevation with some parts broken away and others sectioned, showing a search light or lamp designed in accordance with ouriuvention. Fig. 2 is a rear elevation of the said device, someparts being broken away. Fig. 3 isia longitudinal vertical section taken approximately on the line 00 00 of Fig. 2, some parts being broken away and some being shown in full; and Fig. 4 is a detail View of the carbid holder, some parts thereof being-withdrawn therefrom. 1 The numeral 1 indicates a horizontally-disposed cylindrical case made of light sheet metal, The rear end of this case 1 is closed by a head 2, which, as shown, is provided a with a handpiece 3,"-loy means of which, as willlhereinafterappear, the search-lamp may be adjusted. At its forward end saidcase 1 1 is provided with a hinged annular frame 4,. which holds the glass disk5, through which thelight is projected. Just inward of its forward endsaid case 1 is provided with an internal concave reflector 6, which, as shown,

is removably held in place by a plurality of,

. springdetents 7. Said detents 7 are best atforded by leaf-springs secured at one end to said case 1 and provided at their free ends with prong-keepers 7, which work through suitable perforations in said case and embrace the margin of the said reflector. In a the vicinity of said reflector the case 1 is provided with lower air-passages 9 and upper air-passages 10, the latter of which open beneath an overhead guard-plate 11, suitably secured tosaid case.

:A vertic'allydisposed cylindrical watertan'k'12, provided with a laterally-expanded upper end section 12, extends diametrically through the case 1 back of the reflector (6, with its upper and lower ends projectingthrough said case. This exact arrangement may, however, bevaried. In the lower end of the water-tank 12 is a so-called drying or filtering chamber 13, which, as shown, is pr0- vided in its bottom with a screw-threaded bushing 14, which is normally closed'by a screw-threaded plug 15. Cotton, wool, or other suitable filtering materials is located in the chamber 13 outward of the bushing 14: A gas-conducting tube or pipe 16 opens centrally through the bottom of the watertank 12 or, what-is the same thing, through the upper wall or top of the chamber 13. This tube 16 extends vertically and centrally upward through the said tank 12 and terminates approximately at the upper end thereof. A gas-outlet tube or pipe 17 opens from one side of the'filtering-chamber 13 and extends upward intothe case 1 and then horizontally forward to the gas burner or jet 18,-which projects axially through the reflector 6. A suitable regulating-valve 19, as shown, of the needle-valve form is interposed in the pipe 17 for regulating the flow of the gas to the said burner or jet 18.

or faucet, which opens from the lower portion of'the-water-tank 12. r

, The numeral 21 indicates a screw-threaded plug located in the upper end of, the section 12 0f thewater-tank. This plug 21 isprovided with a small air-vent 22 for rendering atmospheric pressure effective within the said water-tank. When said plug 21 is removed, it opens up a suitable passage for permitting the water to be introduced into the watertank.

The numeral 20 indicates adraw-oif cook The upper head of the tank-section 12 is I shown as provided with a large annular sleeve 23, having an internally-threaded bushing 24. The opening through the bushing 24 is normally closed by a large cap-nut 25,'afforded by a disk with screw-threaded flange which Works in threads of the bushing 24. A hand-piece 26 on the said cap-nut 25 affords means by which it may be readily turned to remove the cap 25 and cylinder 27. The capnut 25 is secured to the upper end of a depending cylinder 27, which serves as a support for the carbid-holder, presently to be noted, and also serves another important purpose, which will hereinafter appear. The lower end of the cylinder'27 is open and extends nearly to the bottom of said water-tank.

It is of course removable with the cap-nut 25. Within the cylinder 27 is a vertically-disposed leaf-spring 28, which serves to frictionally hold the carbid-holder, presently to be noted, in working position. As shown, the cap-nut 25 is provided with a depending sleeve 29, which loosely telescopes over the upper end of the tube 16.

The carbid-holder is afiorded by a cup-like receptacle 30, the sides of which are perforated, preferably with large holes. A perforate water distributing tube or stack 31 is secured to the bottom of the cup 30 and extends axially upward into the same. This tube 31 is open at its lower end and is preferably tapered slightly upward, so as to make it easier to remove the residue or pasty prodnets of the generation.

bid-holder may be easily manipulated in placing it in working position within the cylinder 27 and removing it therefrom.

2 indicates carbid contained within the carbid-holder, and z indicates water contained within the Water-tank.

The lamp is supported with freedom for angular adjustment in a vertical plane and for oscillating movements in a horizontal plane by the following device: 34 indicates a supporting-yoke having a depending stem 1 35, which is swiveled in a pedestal 36 and is 1 adapted to be held where set by set-screw 37.

The case 1 is provided with trunnions 38, by i means of which it is pivotally mounted in the prongs of the yoke 34. A jam-nut 39 on one of the trunnions 38 serves to frictionally hold the said case 1 in any set adjustment with respect to said yoke.

Before the carbid-holder is filled with carbid the perforate lining 32 is inserted within the cup 32. The carbid is placed within said cup between said perforate lining-cylinder 32 and the perforate distributing-tube 31. The

A finely-perforated lining-cylinder 32, having open upper and.

carbid-holder is placed in working position within the cylinder 27 while the said cylinder is removed from the water-tank. When the said cylinder 27 and cap-nut 25 are placed in working position, as shown, the gas-outlet tube 16 extends upward through the tube 31 of the carbid-holder and into the sleeve 29 of the cap-nut 25. The insertion of the said cylinder into working position will cause the water to rise within the water-tank, leaving an air-space in the lower end of said cylinder below the carbid-holder. The air from within thecylinder 27 is drawn 0E by opening the valve 19 and allowing it to escape through the jet 18 until the water rising within the said cylinder comes into contact with the carbid within the carbid-holder and starts the generation of gas. The generation of the gas will then be kept up automatically. When the gas is drawn off at the burner or jet, the water will intermittently rise within the cylinder 27 and onto the carbid, and thereby generate gas sufficient to afford the proper supply at the burner. The water will keep rising higher and higher on the carbid within the carbid-holder until the carbid is all decomposed or eaten up. The water is permitted to attack the carbid both from the outer side and from the inner side, respectively, through the perforate.lining-cylinder 32 and axial water-distributing tube 31. The generated gas passes outward through the tube 16 into the filtering or drying chamber 13, passes through the filtering material 2,

and from thence outward through the tube 17 to the jet or burner 18. Inpassing through filtering material 2 the gas is freed from water and other foreign materials. The filtering material z may be removed from time to time and clean filtering material substituted therefor.

It is of course a well-known fact that the product of the generation of acetylene gas from water and carbid is a heavy pasty substance which increases in bulk over the bulk of carbid which is decomposed. Hence this residue will pack itself very tightly into the carbid-holder and with an ordinary holder is removed with considerable difficulty. With the carbid-holder described the residue may be removed very easily, inasmuch as the carbid is pressed tightly into contact with the removable lining-cylinder 32, which liningcylinder will drop out with the residue. The tapered axial tube 31 offers but very slight resistance to the removal of the said residue. After the lining-cylinder 32 is removed from the holder the residue or lime products may be easily removed therefrom, so that the said lining-section may be used over and over again indefinitely.

It is of course evident that the apparatus above specifically described is capable of a great many modifications as to detail within the scope of our invention.

What we claim, and desire to secure by Letters Patent of the United States,is as follows:

1. In a lamp for generating and burning acetylene gas, the combination with a watertank having the vertical gas-outlet tube 16,

of the cylinder 27 closed at its upper end and removably secured within said watertank, by screw-threaded engagement with the upper head thereof, the carbid-holder 30 having the perforate wall and the perforate, axially-disposed, water-distributing tube 31, through which said tube 16 projects, substantially as described.

2. A carbid-holder comprising the cylindrical cup 30 perforated at its sides and provided with the perforate axial water-distributing tube 31 tapered toward the open upper end of said cup, and the interior lining-cylinder 32 open at both ends and perforated at its sides and cooperating with said cup, substantially as described.

In testimony whereof we affix our signa- 2o tures in presence of two witnesses.

ALBERT J. MURDOOK. CHARLES M. STROUD. Witnesses:

ELIZABETH KELIHER, F. D. MERCHANT. 

